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HomeMy WebLinkAboutMiscellaneous - 206 FOREST STREET 6/26/2002 NOONAN &'Mc DOWELL, INC. 25 Bridge Street, Suite 6, Billerica, MA 018211023 Voice (978) 667-9736 Fax (978) 671-9565 Email: nm@netway.com Date. Town of North Andover Office of the Health Department Community Development and Services Division 27 Charles Street North Andover, MA 01845 RE: Subsurface Sewage Disposal System Plan Review, 1770/ (,,/`/,,�� F, Assessors Map Lot Dear Members of the Board, Please be advised that Noonan &McDowell, Inc. has reviewed the plan datede 1; JOV by It is our opinion that the proposed design will meet the requirements of Title 5 and the North Andover Board of Health "By-Laws" if the following is addressed: /C ................. el e 2­1111­............- .......... ...... n_ .......... K"V A Respectfully, John L. Noonan, P.L.S.-P.E. a: G:office/forms/tonarev ...... 'Q Land Surveyors Civil Engineers Environmental Planners o „o eau n Ik a r o ✓ d f ry m ✓ s a, F � r 1 a H e� r, 7 P^ � a IN, �*, � � � ��� i� r � ,.�y�rr,im u;"�" �: ^ �xrr,✓;� arn'' "" A�,�a � l � � � k .d.n ew✓ ? M iolr, pwwry �1 w NgWWPw rybuvJ or z q .w d ri�/// uYir wr w s n 1 r d� nin��'✓ o�p� y �,�. .. �"+�»" i:,.n. � d�h�!I/'� �,,, a!, v�.a�, u� � �dr���, d�`. %",,.,�,,1✓r.�`u" .�w.� a -,, 4 CHECKLIST FOR NORTH ANDOVER SEPTIC SYSTEM PLANS N&M Job 1770/ 1; ° s� (') ,</ The following is a checklist that incorporates all Title 5 and local regulations for septic plans. Name of Applicant: ',` � Name of Designer: Plan Date: Date: '°' Date of Review: Property Address '`' � �� �� � a� F � Map: ,�'°�'�` �'� Lot: , °' i' .� BOH Reviewer: ' Type of Plan(new ou'fipgrade) Number of Bedrooms in Assessor's Records: gpd)Garbage Disposal Allowed: General Information: N.A.=North Andover Septic Regulations Other numbers refer to Title 5 OK Problem N/A Street number and map/lot-220(4)(u) Maximum scale of 1 "=40'for plot plan-220(4) Maximum scale of 1 "=20'for profile and component details-220(4) Legal boundaries of the facility being served-220(4)(a) Names of abutters from recent tax map- NA 8.02j `tl . Number of bedrooms,design calcs.,-NA 8.021 Name&address of record owner&applicant- NA$.02k :1 Name&address of designer-NA 8.021 Holder and location of all easements-220(4)(b) Date plan drawn&any revision date- NA 8.02m All dwellings and buildings,existing and proposed-220(4)(c) Location of all existing or proposed impervious areas-220(4)(d) All distances on site plan—NA 8.03a-c Elevation of proposed driveway-NA 8.02t Location and elevation of foundation drain-NA 8.02y Location and dimensions of the system Incl.reserve(new const.)-220(4)(e) = " Limits of excavation of leach area on site plan-NA 8.02z Locus plan-220(4)(t) (Not to scale) North arrow-220(4)(g) Existing and proposed contours-220(4)(g) Locations and log's of deep holes-220(4)(h) Locations and logs of percolation tests-220(4)(i) Date(s)of soil testing-220(4)(h)&(i) ' Existing grade elevation of each deep hole-220(4)(h) Elevation of percolation tests—N.A. 8.02n _. Name of approving authority representative-220(4)(h)&(i) Name of soil evaluator-220(4)0) ��. Soil logs and perc test logs match BOH records Locations of waterlines,drains,and subsurface utilities-220(4)(m) Observed and adjusted g.w. elevation in the vicinity of the system-220(4)(n) Complete profile of the system to scale-220(4)(o),NA 8.02c Cross section of leaching facility-NA 8.02w (Not to scale) Location of benchmark(s)within 50-75 feet of facility-220(4)(q) / Note listing all variance requests with proper citations-220(4)(p) Local upgrade approval request form submitted-403(1) Original R.S./P.E.stamp,signature&date-220(1)&(2) If P.E.,discipline specified within stamp. MGL C. 112 s. 81M sfc. supplies(w/in 400'),pub. wells(w/in 250'),pvt. wells(w/in 150') -220(4)( Location of watercourses, wetlands,wells,etc. Win 150'of system—NA 8.02r Wetland disclaimer—NA 8.02s RLS plan reference&certification required(prop line setbacks) -220(3) Use approvals rovals/standards checked for I/A system-DEP docs., 2 Perc rate>30 MPI-not allowed for new,LUA for upgrade-245(1)&('3) Perc rate > 60 MPI-must use modified tight tank or I/A technology-245(4) Proposed system qualifies as "shared" system-002 (definitions) Flow is over 2,000 gpd-No R.S. allowed-220(1) Design flow was set in accordance with code-203 Existing system location and note on proper abandonment-354 E"77' Leaching facility at least 1' above Base Flood elevation—NA 9.05 All piping Sch 40 minimum—NA 10.01 Basement floor minimum 1' above groundwater elevation—NA 5.04 Foundation drain present with elevation—NA 8.02y On-site Soil and Groundwater Review OK Problem N/A Proper deep observation hole logs on plan-220(4)(h) All deep holes and peres shown,including aborted tests—NA 8.02n Soil evaluation forms submitted within 60 days of field work-018(2) (� Proper percolation test log-220(4)(i) Ample deep observation holes in primary disposal area(minimum 2) - 102(2) f Ample deep observation holes in secondary disposal area(minimum 2) - 102(2) Ample perc testing(one in each disposal area,3 in prim.>2,000 gpd)- 104(4) Deep hole testing conducted within two years—NA 7.05 Hole Identification Numbers: ground elevation el. " acceptable soil el. Leach facility invert el. " ground water el. refusal el. a bottom of leach facility el. thickness of acceptable soil 6,�'"" before&after soil R&R "-'-separation to groundwater separation to refusal .- soil class perc rate loading rate septic tank below g.w.table " (yes or no) pump tank below g.w.table ,µ' (yes or no) I.f in fill -255(l) Setback Distances(Given in feet) 15.21 1 YES NO Is the lot in the Lake Cochiewick Watershed? NA 6.00&5.02 OK Problem NIA Septic Tank Leach Facility Property line 10 10 Cellar wall 10 20 2 3 w Inground pool 10 20 Slab foundation 10 10 Deck,on footings,etc. 5 10 ....."....... Waterline 10 10 Private drinking well 75 100 Irrigation well 75 100 Wetlands � 75° 100 Public well 400 400 Wetlands bordering surface 150 150 water Supply or trib. (in Watershed) Trib.To Surface Water supply 325 325 � Reservoirs 400 400 Tributaries to reservoirs 200 200 -~- Drains(wat.supply/trib.) 50 100 "= Drains(intercept g.w.) 25 50 - Foundation drains 10 20 Drains(Other) 5 10 - Drywells 20 25 Downhill slope 15'to 3:1 slope w/o barrier Buildin&Sewer OK Problem N/A Grease trap required for certain uses(check 230 for details) - Pipe diameter listed(4"minimum)-222(1) Pipe schedule listed-222(3) Pipe cast iron or Sch 40 PVC—NA 11.02 Watertight joints specified-222(3)&(4) Pipe laid on compact,fin base-222(5) Pipe laid on continuous grade in straight line-222(7)0 Cleanouts precede all changes in alignment and grade-222(8) Cleanout provided every 100 feet-222(8) Manhole at any 90 degree alignment change-222(8) Invert elevation at building: Invert elevation at septic tank: Length of run: _ Slope: (minimum of 0.01 -0.02 desired)-222(6) 10'offset to private well or suction line-222(2) 3 4 Septic 'Tank OK ,Problem. N/A t Tank is accessible-228(3) No structures above tank–(228(3) Tank can accommodate both primary&reserve–NA 9.04 200%of flow(required&provided given. 1500 min.)-220(4)(f)&223)(1)(a) 2-3"drop from inlet to outlet-227(5) Minimum of 4'liquid depth-223(2) 3"air space above tees/baffles(minimum)-227(4) 9"air space above flow line(minimum)-227(4) Tees are not to be replaced by baffles-227(1) Tees extend 6" above flow line-227(1) Inlet tee extends 10"below flow line(minimum) -227(6) Outlet tee extends 14" below flow line(more for deeper tanks)-227(6) Gas baffle installed on outlet-227(4) Access manhole cover above center of tank&each tee(except 2 compact)228(2) " 3-20" manholes-228(2) 1 childproof,24"riser/manhole Win 6"of final grade if c1000gpd-228(2) Inlet and outlet tees on center line-227(1) Soil compaction below tank specified(if soil is non-native)-221(2) 6"of<=3/4"stone beneath tank specified-221(2) &22 8(1) If> 1,000 gpd AND not a single faro.dwell.must be 2 tks or 2 camp. -223(1)(b) If plan specifies disposal must be 2 tanks in series or 2 comport. tank-223(1)(c) Buoyancy calcs.required if tank at or below water table-221(8) Tank is watertight-221 (1) 9" of cover over tank(minimum)-228(1) H- 10 loading(min.)-H-20 if traffic-226(3) Top of tank<=36"below grade-221(7) All pumping to tank(if applies)in accordance with-229 Tank is set to keep old system in service during install if possible Distribution Box(Check here if not present: ) OK Problem N/A Inlet elevation: Outlet elevation: 0.17'drop frpminlet to outlet(minimum) -232(3)(b) 6" sump,,(" inimum)-232(3)(e) Allo°utlets at same elevation-232(3)(b) Nutlet pipes laid level for first 2 ft. -232(3)(c) Pipe Sch 40-NA 10,01 -`1 Number of outlets: Number„of"laterals: Size of outlets: Inlet baffle/tee min. 1" over,otitlet invert for all d-boxes-232(3)(a), " — 6�of tone benea�thl�stributiontbox specified 221 2oi1 is non nat,�,ve)—°22'1'(2)`" Box is watprtigli t-221 (l) p ( ) Top ,f116x<=36"below grade-221(7) a �.. bis � Buoyancy calculations required if t or below water table-221(8) Pump Chamber(Check here if not present: ) OK Problem N/A � Volume specified: 220(4)(x) Pump on elevation- 220(4)(r) Pump off elevation: 220(4)(r) Alarm on elevation: 220(4)(x) Number of cycles per day-220(4)(r) (also 254(1)(d) if gravity from d-box) Minimum 2"delivery line to d-box if gravity-254(1)(c) 4 5 wy, Pressure dosed 1.f. if flow>=2,000 gpd-254(1)(a)&254(2)(a) Cycles per day is consistent with chamber volume-23 1. Volume calculations include flowback volume-2') 1(2) 24 hour storage capacity above pump on elevation-231(2) Number of pumps: 2 if system serves>2 dwelling units-231(6) ` Capacity of pump(s)- gpm @ 'TDH-220(4)(r) Pump can pass 1 1/4 "solids(minimum)-231(7) Pump controls specified-220(4)(r) ;z', „ Alarm equipment specified-231(2) n. Alarm is in building and powered on separate circuit from pump= 1(9) Pump sequence correct(off-lead on-lag on-alan-n on)-231(8) Pump performance curves included-220(4)(r) ' Manual operating switch-NA 12.01 Check valve,bleeder hole-NA 12.01 r 1 childproof,24" riser/manhole to final grade-2'31(5), Soil compaction beneath pump chamber specified(if soil is non-native)-221(2) 6"of<=3/4"stone beneath chmbr.specified-221(2)&228(1), Buoyancy calculations if chamber is at or below water table-221(8)@ 9" of cover over chamber(minimum)-228(1) H- 10 loading(min.)-H-20 if traffic-226(')), Chamber is watertight-221 (1) Top of chamber<=36" below grade-221(7) Leaching Facility(general-complete for all designs) OK Problem N/A 50%larger if garbage disposal-240(4) Trenches to be used whenever possible-240(6) No vehicle or imperv. area above U unless unavoidable-240(7);NA 13.02 Vented if under impervious cover-241 (1) Vented through same pipes as distribution system-241 (1)(a) Vent protected from precipitation/animal entry-241 (1)(b) Vent is placed beyond traffic or impervious area-24 1 (1)(c) All lines connected to vent if bed or trenches-241(1)(d) 9"cover over peastone-240(9) Reserve area provided(new construction)-248(1) ° - Reserve 4' from primary leach area—NA 9.04 4'(5'if Perc rate<=2 MPI) separation to g.w. -212(a) &(b) 4'(down to 2'with variance or I/A-upgrades only)of natural soil under 11 ^, wa• GW separation is adjusted to highest existing grade if facility cuts into a hillside T Pipe slope minimum of 0.005 -251(9) d� Require 5'removal and replacement if in fill-255(5) Top of leach facility<=36"below grade-221(7) Final grade over 1.f. minimum 0,02 ft/ft-240(10) Surface&subsurface drainage away from l.f.-240(1 1) &245(5) Minimum design flow 440 gpd without deed restriction-NA 13.01 3:1 slope where grading required-255(2) Toe of fill slope stops 5'from property line or swale installed-255(2) -.._" Impermeable barrier if¢3:1 slope or< 15 feet to—3:lslope-255(2) Impermeable barrier/retaining wall poured concrete—NA ' Retaining wall stamped by P.E.-255(2)(b) Top of retaining wall>=top of peastone elevation-255(2)(f) 10'offset from edge of leach facility to edge of ret. wall-255(2)(g) Perc test(s)done in most restrictive layer- 104(2) Perc test 4' below leaching elevation—NA 7.06 Design flow listed and required/provided leach area given-220(4)(f) Leach pipes SCH40 PVC—NA 10.01 Leach pipes minimum 4" diameter except for dosed system—NA 14.04 Leach lines capped,vented,or connected together-251(9) Pressure dosing guidance followed if pressure distribution-254(2)(c), Pressure dosing required over 2,000 gpd or with I/A remedial use-231(1) 5 6 Leaching'Trenches(Check here if not present:�) OK Problem N/A Number of trenches:_ Minimum of 2 trenched""NA 9„01(2) Depth of trenches(max eff. 2'): -247(1) Width of trenches°(2'min.,4'max.): -251 (1)(b) Length of trenches(100'max.): -25 1 (1)(a) e Trenches,fie vented(when>50')-251 (11) — � Trenches follow contour lines-251(2) Trench spacing 3 times effective width or depth minimu X251 (1)(d) Ip°ill or reserve between trenches, 10'min.-NA 14,01"& 14.03 /"°Available leach area given(Min.500 s.f.)-NA 01(2) x W �# – ^° Bottom=L 9. – s.f. — Sidewall=L x D x# x 2= s. f. Effective leach area given Loading factor: —� Effective area=total area s.f, x LTAR = g/day --- Effective area is>=design flow of facility being served 2"of 1/8"- 1/2"2x washed peastone.-247(2) Trench depth of 3/4" to 1 1/2"double washed stone-247(1) Leach Fields(Check here if not present: ) OK Problem N/A Number of fields: (need dosing chamber if> 1,231 (1)) – –� Length(100'max.): -252(2)(b) Width: - , Total area:L x W = s. f. Minimum 900 square feet-NA 9.01(1) Distribution lines connected with solid pipe–NA 15.01 ©= =v Effective leach area given Loading factor: Effective area=total area s.f x LTAR – g/dav Effective area is>=design flow of facility being served Minimum of two distribution lines-252(2)(a) 6'line separation(max.)-252(2)(d) 4'maximum separation from edge of field to line-252(2)(e) 10'minimum separation between adjacent leach fields-252(2)(1') Between 6" and 12"of 3/4- 1 1/2" stone beneath field-252(2)(g)&247(2) 2"of 1/8"-1/2" 2x washed peastone.-247(2) Final GradinL OK Problem N/A Slope over leach area minimum of 0.02 feet/foot–240(10) Grading shall divert drainage away from leach area–240(l 1) 5/24/01 Grading slopes away from dwelling f:/office/forms/tonackltr.doc 6